Question

find step by step plzzzzz answer it.....​

Answer 1

Step-by-step explanation:

hope it helps you..........

Answer 2

$\huge\bold\red{ANSWER}$

$\huge\bold\red{Question=>7}$

(√3-1)/(√3+1)=a-b√3

FIRST RATIONALISE IT

=>(√3-1)×(√3-1)/(√3+1)×(√3-1)

=>√3(√3-1)-1(√3-1)/(√3)²-1

=>(3-√3-√3+1)/3-1

=>4-2√3/2

=>2(2-√3)/2. (here 2 2 cancelled out)

=2-√3

comparing above with a-b√3

we get

a=2

b=1

$\huge\bold\red{Question=>8}$

Here

x = 3+ √8

x = (3+√8)(3-√8) / (3-√8)

x = (9 -8) / (3-√8)

x = 1/ (3 -√8)

Or we can write 1/x = (3-√8)

Put the value and find out

x² +(1/x²) = x² + (1/x)²

So x² + 1/ x² = (3 +√8)² + (3 -√8)²

= 9+6√8+8 + 9–6√8+8

= 34 .....ans....

$\huge\bold\red{Question=>9}$

put x=2 in p(x)

then,

2x²-3x+7a=0

2×(2)²-3×2+7a=0

2×4-6+7a=0

8-6+7a=0

2+7a=0

7a=-2

a=-2/7.....ans...

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